Willia m ii



(No Model.) 2 Sheets-Sheet 1.

W. H. APPLETON MACHINE FOR ROLLING SEAMLESS TUBES.

No. 369,311. Patented Sept. 6, 1887.

Y/IIII/IIIf/ll/ (No Model.) 2 Sheets--Sheet 2.

W. H. APPLETON. MACHINE FOR ROLLING SEAMLESS TUBES.

No. 369,311. Patented Sept. 6, 1887.

NITED TATES Pa'rhiwr @rricn.

\VILLIA M H. APPLETON, OF NE\V YORK, N. Y.

MACHINE FOR ROLLlNG SEAMLESS TUBES.

SPECIFICATION forming part of Letters Patent No. 369,311, dated September 6, 1831 (No model.)

To all whom it may concern! Be it known that I, WILLIAM H. APPLE- TON, a citizen of the United States, and a resident of the city, county, and State of New York, have invented certain new and useful Improvements in Machines for Rolling Seamless Tubes, Pipes, and other Hollow Articles from Hollow Ingots, of which the following is a specification.

My improvements, while capable of use in part with certain forms of what are known as universal rolling-mills, or those in which a pair of vertical and a pair of horizontal rolls are employed, are designed more especially for application to the forms of machine illus' trated in Letters Patent of the United States numbered 278,340 and 325,938, respectively, to which reference may be had.

In the construction of universal rolling-mills prior to the date of the patents aforesaid it had been the custom to support the under roll of the horizontal pair in fixed hearings, or in bearings which were incapable of any vertical adjustment, and to efiect the reduction of the material being operated upon by adjusting the upper roll of such pair toward the under roll by means of screws or otherwise, one or both of the rolls of the vertical pair being similarly adjusted toward the other or toward each other, as the case might be. The under roll of the horizontal pair, being thus mounted in fixed or stationary bearings, with no means provided to raise or lower it, asaconsequence always remained permanently at the same elevation, and the rolls or bed by which the ma terial being reduced was, supported and can ried to and away from the reducing-rolls were or was similarly mounted and were or wasincapable of any adjustment to a higher or lower elevation.

The construction and arrangement of parts as thus described, while advantageous in rolling-mills employed for rolling solid articlessuch, for instance, as plates, square bars, &c.-

are incapable of use for rollingseamless tubes, pipes, and other tubular articles in which a stationary mandrel is employed, as no provision is made therein for maintaining each of the rolls at the same distance from the axis of the mandrel, or from a central line passing between them, as in the others, during the Various adjustments thereof necessary to the reduction of the material and the production of the finished article.

In the Letters Patent here'inbcfore referred to this last-mentioned objection was partially overcome by mounting both the upper and under rolls of the horizontal pair, as well as both of the rolls of the vertical pair. in adjustable bearings and providing each of said bearings with a screw, whereby not only could both the vertical rolls be adjusted toward and away from the axis of the mandrel, but also both of the horizontal rolls as well. This organization of mechanism, while rendering capable the adjustment of the rolls to maintain the relation between the grooves therein and the axis of the mandrel, has been found defective, principally because of the fact that each of the said screws is independent of and unconnected with the others, and in the adjustment of the rolls each of said rolls is adjusted by itself apart from the others, requiring not only much time therein, but great diificulty was experienced in moving them all at the same distance to bring them into proper relation with respect to the mandrel.

The objects of my invention are therefore, first, to overcome this defect and to provide means whereby the adjustment of both the rolls in the vertical and horizontal pair may be effected simultaneously and at precisely the same distance; second, to furnish improved means for maintaining the free end of the mandrel in proper relation to the rcducingrolls when the tube or other article being reduced is clear from such rolls and has been either forced upon the mandrel or withdrawn therefrom; third, to provide means for adjusting the rolls which support and carry the material being reduced to and away from the reducingrolls to maintain them in proper relation with respect thereto, and, fourth. to devise means whereby the flexure or bending of the mandrel may be prevented while the pipe or other article being rolled is forced upon it in the operation of rolling.

To this end my invention consists in the mechanism whereby these results are accomplished, the nature and distinguishing characteristi cs of which will be best understood by reference to the accompanying drawings, in which- Figure 1 represents a side elevation of a portion of a universal rolling-mill with my improvements applied thereto, a portion of the standards or housings being broken away to show parts beyond, and the cylinders for operating the adj listing-shafts being omitted; Fig. 2, a plan view thereof, with the cylinder for operating the adj listing-shafts in position; Fig. 3, a sectional elevation of a slightly-modified form of mandrel and its arrangement with other parts with which it cooperates. Fig. 4 is a section taken on the linex wof Fig. 3, and Fig. 5 a detail illustration of the relation of the supporting-r0] ls with respect to the reducing'rolls during the operation of rolling.

In all the figures similar letters designate corresponding parts.

A A indicate standards or housings having suitable guideways, a 1), formed therein for the reception and accommodation of boxes or bearings c c d d, and B B O O are circumferentially-grooved reducing-rolls carried thereby, the former of which are arranged'upon horizontal axes and the latter upon vertical axes, all as shown.

D D E E indicatescrews by means of which the various rolls are adjusted toward and away from the article being rolled, and F the stationary mandrel over and from which such article is alternately forced and withdrawn during the rolling operation.

The parts as thus far described are or may be of the forms illustrated in the'Letters Pat cut above noted, and their arrangement may be substantially the same as thatshown therein. The screws D D" E E, however, while constructed and arranged in substantially the same way as those shown in said patents, are each provided at its outer end with a plain portion of considerablelength, from which the screw-thread is omitted, as shown at e e in Figs. 1 and 2.

F F G G indicate gear and sprocket wheels, respectively mounted upon these plain portions, and being connected to them by means of groovc-and-feather connection f f in such manner as to permit of the movement of the latter longitudinally through the former in of fecting the adjustment of the rolls, while at the same time compelling them, wit-h their screws, to revolve with the gears and sprocketwheels as such devices are rotated.

The gears F F are of the ordinary spur form, and are mounted upon the plain portions of the screws D D, respectively. The gears G are of the bevel forni,and are mounted upon the plain portions of the screws E, while the sprocket-Wheels G are similarly carried by the plain portions of the screws The gears-wheels F F are of precisely the same diameters and mesh with spur-gears H and H, respectively fixedly secured upon the vertical shafts I 1, which are arranged in suitable bearings, g upon opposite sides of the machine. The gears H H are also of the same diameters, so that upon rotating either of said shafts the gears F F, meshing with the gears carried by it,will both be revolved through precisely the same angular distance. The effect of this will be to cause the rotation the screws upon which such gears F F are mounted, and the consequent adjustment toward and away from the other to precisely the same distance of each of the boxes or bearings c 0, upon which such screws operate. The sprocket-wheels Gr upon the plain portions 6 e of the screws E are each preferably connected to and rotated from the bevel-gear G, located upon its respective side of the machine, through the intervention of a second sprocket-wheel, K, of the same diameter as the first, secured to or formed on the hub of said gear, and a chain, L, passing over both of said sprocket-wheels, the arrangement being such that upon rotating the gear G the sprocket-wheel G will be revolved through precisely the same angular distance as said gear. Meshing with each of the bevel-gears G,on opposite sides of the machine and of the same diameter, is a bevelgear, M, which is secured to the upper end of an inclined shaft, N, mounted in suitable bearings,1l i, bolted or otherwise sccured to the standards or housings A A, and carrying at its lower end a second bevel-gear, O, which meshes with a third bevel-gear, P, of the same diameter as itself, secured to the vertical shaft I or I.

By the means as thus described it will be seen that upon rotating either of the vertical shafts I or I the various screws located on the same side of the machine as such shaft will be all rotated to precisely the same extent, and the hearings in connection with which they operate will all be adjusted simultaneously toward and away from each other to exactly the same distance, the direction of adjustment depending upon the direction in which said shaft is revolved. Various means may be employed for rotating these shaftsas,

for instance, a hand-wheel secured thereto orother suitable device-and the two shafts I I may, if desired, be connected so as to revolve in unison and cause the adjustment of all the bearings upon both sides of the machine, and

with them all the reducing -rolls simnlta.

neously, by means of a chain and sprocketwheels or by a cross-shaft and bevelgears.

The arrangement of parts whereby the two shafts are revolved in unison is the one I adopt in practice; but instead of rotating said shafts by hand I prefer to operate them by power, and for this pu'rposel secure to the lower end of each of said shafts a spur-gear, P, which meshes with a rack, R, extending transversely of the machine, and being connected to the end of a piston-rod, S, which, with a suitable piston, is fitted to work in the steam-cylinder T. The gears 1? l are of precisely the same diameter, and the rack R, which meshes with them, is of such length as to rotate them several times in being reciprocated the length of its movementin either direction, the number of rotations of said gears by one reciprocation to the same extent of ITO of the rack beingsnfficientto effect the greatest range of adjustment of the reducing-rolls that will be required in any case.

The reciprocation of the rack, as will be understood, is effected from the steam cylinder T through the medium of the piston-rod S and the piston thereon, which cylinder is of proper length to cause said rack to travel to its extreme limit of movement in either direction; but instead of being constructed as is common with steam-cylinders generally, the ordinary steam. ports and chest are omitted, and in lieu thereof it is provided with inductionpipes is it and'eduction-pipes Z Z Z, &c. The eduction-pipes Z Z, 850., which are in practice prefcrably constructed of somewhat greater diametcrthan the induction iJeskk are arran ed P l 7 i:

at certain disiances apart, dependent upon the amount of reduction that is to be given to the material being operated upon at each passage between the reducing-rolls, and are, with the induction-pipes It, provided with suitable valves, mm, whereby the flow of steam or other elastic medium to and from the cylinder and the amount of movement to be given to rack R at any particular time may be governed. For instance, the piston and the rack being at the extreme limit of their movement toward the rear of the cylinder, and the reducingrolls ]3 B G 0 being withdrawnfrom each other and from the axis of the mandrel to their greatest extent, with all the valves mm in the induction and ednetion pipes closed, and it being desired to adjust the rolls toward each other a certain distance, the valve of the eduction-pipe corresponding to that distance for example, the valve in eduction-pipe Z-is opened and the steam admitted to the cylinder through the induction-pipe k by opening the valve m therein. The steam thus entering the cylinder will cause the piston, the piston-rod, and the rack to move forward with it, rotating the vertical shafts I I by the engagement of the rack with the gears P P thereon, and, through the various screws D D E E, cause each of the reducing-rolls to approach the other through precisely the same distance. The continued flow of steam causes the piston to move forward until it has passed the inner end of the eduction-pipe Z, when the steam will be discharged through said pipe and the further movement of the piston arrested. The valve in the induction-pipe k is then closed and the adjustment is completed. If, now,

it be desired to adjust the reducing-rolls toward each other still farther-as, for in stance, to the distance corresponding to the eduction-pipe Z--the valve min that eduction-pipe is opened and the steam admitted to the cylinder through the pipe is, when the same operations will be repeated and the reducing-rolls adjusted, as before, and so on until the piston-rod has passed the last eduetionpipe next to the forward end of the cylinder.

The piston is then forced back to its startingpoint, carrying with it the rack and the various reducing-rolls, by closing all the valves in the eduction-pipes with the exception of that in the pipe'l, which is opened, and admitting steam into the otherend of the cylinder through the induction-pipe 7a, which can be effected by opening the valve. m therein. By this arrangement of parts, as will be seen, I am e11- abled to adjust the reducing-rolls by power either toward or away from each other, and at the same time to maintain them in their proper relation with respect to the axis of the man drel and with each other, the amount and di rection of adjustment of said rolls depending at all times upon the arrangement of the eduction-pipes Z Z", &c., in the cylinder T', and upon the order in which their valves and those in the induction-pipes kit are opened and closed.

The mandrel F is anchored or supported at its rear end by any suitable or well-known means. I prefer, however, to employ the device shown in the later of the patents hereinbefore referred to as being the most simple and efficient for this purpose; and in order to sup port its front or free end and hold it in proper central relation with respect to the grooves in the reducing-rolls for entering the aperture in the article being rolled when said article is presented to the reducing-rolls, I make use of the supportingroll V, upon which it rests. This supportingroll is journalcd in the free end of an arm, a, which is jointed or hinged at its lower end to the stock or bar n,fitted in a suitable holder, 1), in which it is vertically adjustable by means of a screw, 1). The arm it, when the mandrel is free from the article being rolled, or when such article has been forced upon it to such a distance that its rear end has passed beyond the point where said arm is located,is ina vertical position, with the supporting-roll V resting in a notch or depression, q, formed in the mandrel, it being held normally in that position by a spring, r, acting upon a segmentally-shaped cam, 1', se cured to its side, as shown in Fig. 3. This arm, however, while being thus held, is capable ofa swinging movement eitherto the right orleft therefrom, as shown in Fig. l, to carry it and the supporting-roll V down and away from the mandrel F to permit of the article X being rolled passing on over the same or of being withdrawn therefrom; and in the operation of rolling this swinging movement will be given to said arm by the forward end of the article being rolled striking the roll V and carrying it forward with the arm until such devices are swung down below and out of the way of said article, the return of these parts to their normal positions being effected after its passage by the spring 1' and cam 1". The movements of the arms, as thus described,talre place with every passage on or off the mandrel of the article being rolled, the hinge or joint by means of which itis connected to the stock or bar 1) permitting of its movement in both directions with equal facility.

X X indicate the rolls by means of which the article being rolled is supported and carried to and away from the reducing-rolls, and

IOC

X X stands in which they are supported. These rolls are preferably constructed with a circumferential groove in their faces, of circular form, and instead of being mounted in fixed bearings, as has been the custom heretofore,v

in sets or groups, those, for instance, on oneside of the machine, as at the right of the reducing-rollsin Fig. 1, constituting one set, and those on the other side, or left, of the red ncing-rolls in said figure making up the other, and to rotate the rods of each set in unison independently of the others. For this purpose I provide each of said screw-rods at its lower end with a bevel-gear, it, which meshes with a corresponding bevel-gear, a, mounted upon the adjusting-shafts o 'v. The bevelgears on the screw-rods t t are all of the same size, as are also the corresponding gears on the adjusting-shafts v 12.

Various means may be employed for connecting and rotating the adj usting-shafts appertaining to each set of screw-rods. The mechanism adopted by me, however, for this purpose consists of a spurgear, y, mounted on each of said shafts, and a rack, Z, intermesh= ing therewith, the said rack being arranged transversely of the machine and being reciprocated from the steam-cylinder Y through the intermediary of a piston and a piston-rod,

y It will thus be seen that upon reciprocating either of the racks the adjusting-shafts o c, operated therefrom,will be rotated, and the rolls of the set to which they belong will be adjusted either up or down through the medium of the screw-rods and gears, according as the rack is reciprocated in one or the other direction.

Thesteam-cylinders Y Y, for operating each of the racks Z Z, are similar in all respects to the cylinder T, for adjusting the reducing-rolls, and the induction-pipes z z, ed-uction-pipes I 'z z, &c., and the valves 3/ and 1 are all arranged and operated in precisely the same manner as the like-parts shown in connection therewith.

The rolls X X of either set being in their lowest position, the piston in the cylinder Y withdrawn to the rear end of the latter, and it being desired to adjust said rolls to a certain height, the valve in the eduction-pipe corresponding thereto will be openedas, for instance, z-and steam admitted to the cylinder through the induction-pipe z by opening the valve 31 and the piston, with its rod y, will be forced forward, carrying with it the rack Z, which, through the gears and adjusting-shafts o 12, will revolve the screw-rods t t and adjust the rolls to the required position. The valve y will then be closed and the required adjustment is effected. If, now, it be desired to adjust the rolls to a still higher altitu de,the valve in the educti on-pi pe corresponding to that elevation will be opened, the steam admitted through the induction-pipe 2, as before, and the new adjustment attained, and so on until the piston has been carried past the last eduction-pipe, z. The piston and the rolls X X will then be returned to their original position by closing the valves in all of the eduction-pipes with the exception of that in the pipe 2 which will now be opened, and admitting steam to the other end of the cylinder through the induction-pipe 2 by opening the valve y therein.

The cylinders Y Y in practice are constructed of such length as to cause the same range ofadj ustment of the rolls XX as is given to the reducing-rolls B B O O by the cylinder T, and in order to provide for adjusting the former rolls with reference to the latter theeduction-pipes in the cylinders Y Y are arranged in such relation to the eduction pipes in the cylinder T that upon opening the valve in any one of said pipes of either of the former cylinders and admitting steam to said cylinder in rear of the piston the rolls X X, open ated therefrom, will be adjusted to precisely the same height as will be attained by the under roll, B, of the reducing-rolls upon opening the valve in the corresponding eductionpipe in the cylinder T and admitting steam similarly to that cylinder. In other words, upon adjusting the reducing-rolls to any position determined by any one of the eduction pipes in the cylinder T the rollsXX will be adjusted to precisely the same height as the under roll, B, of the horizontal pair thereof by opening the valve in the corresponding eduction-pipe in either of the cylinders Y Y and admitting steam to that cylinder. The eduction-pipes of these several cylinders being thus arranged, the adjustment of the supportingrolls with respect to the reducing rolls is readily accomplished.

In rolling a tube or other article the retina ing-rolls will first be withdrawn to their utmost limit and the supporting-rolls drawn down to their lowest point, in which position the upper surfaces of the latter will be in a line with the upper surface of the under reducing-roll, B, this being insured at all times when thus retracted by means of the setscrews Z, passing through the cylinder-heads and abutting against the rear sides of the pistons. The heated ingot is then placed'upon the set of supporting-rolls to theleft of the reducing-rolls. The reducing-rolls are next adjusted toward each other by means of the steam-cylinder T, and the set of supportingrolls to the right of the reducing-rolls are adjusted upward by means of their cylinder until their upper surface is brought into line ICC with the upper surface of the under reducingroll. B. The redncingrolls are then started and the heated ingot drawn in between them and over the mandrel, the relation of the various rolls-both reducing andsupporting-at the reducingrolls is now reversed. The effect of this will be to withdraw the ingot from the mandrel and carry it back between said rolls, after which the reducingrolls will be again adjusted and reversed and the ingot passed through. between them, as before, and so on, the set of supportingrolls toward which the ingot is carried being always adjusted to the same height as the under reducing-roll, B.

I sometimes find it convenient to rotate the supporting-rolls positively from the reducing rolls, and for this purpose I employ the chain or belt 2, which passes over a grooved pulley or sprocket-wheel, 3, on the journal of the under roll, B, and around a similar pulley or wheel on thejournal of each of the adjustingrolls, as shown at 4:. By this means, as will be seen, a positive motion is given to the supporting'roll in the same direction as is imparted to the redncingroll.

I have shownin the drawings only one supporting-roll in the set to the left of the reducingroils, and but two of such rolls in the Set at the right thereof; but it is to be understood that in actual practice these numbers will be increased and each set be made to include quite a number of such devices.

In Figs. 1 and 3 I have shown the devices by means of which the fiexnrc or bending of the mandrel is prevented when the tube or other article is being forced thereon. These devices consist of suitable guideways, 5, secured to the stands X X, both above and below the mandrel F and have fitted in each a stock or bar, 6, to the end of which is hinged orjointed an arm, 7, carrying in its free end a roll, 8. These rolls are provided in their periphery with a groove of such a contour as to accurately fit the surface of the mandrel against which they bear. When the mandrel is free, or when the tube or other article has not been forced thereon sufficiently far as to arrive opposite these rolls, the arms 7 carrying them are in a vertical position, as shown at the extreme right of Fig. 1, and the mandrel is held not only from vertical but also from lateral flexure. As soon, however, as the forward end of the tube or other article arrives opposite any one of these rolls, it strikes the same and, through it, swings its carrying-arm back away from the mandrel sufliciently far to permit of the tube or other article being forced thereover. The arms are then held in this position until such tube or other article is withdrawn from the mandrel, when they swing back into a vertical position, and so remain until again swung away thereby. If desired, a light flat spring, 9, or, in place thereof, a strap and weight, may be employed for returning the arm to'its vertical position after having been swung therefrom; and in order to adapt these devices to maudrels of different sizes, I prefer to make the stocks 6 adjustable in guideways 5, and employ setscrews 10 for effecting their various adjustments.

In the machine above described the mandrel F has been of the form of that illustrated in the later of the patents above alluded to; but in Fig. 3 I have shown the mandrel pictured and described in the earlier of said patents employed in lieu thereof, the same being provided with the rolls 11 11, for contact with the interior of the pipe or other article being rolled, and the pipes 12 and ducts 13, by means of which water may be conveyed to and discharged upon said rolls to lubricate them when in operation. a

From the foregoing it will be observed that I produce a machine for rolling tubular or hollow articles in which the adjustment of all the reducing-rolls necessary to the production of the finished articles is effected simultaneously and by power, and, in addition thereto, provide means whereby not only the rolls which support and carry the article being rolled to and away from the red ucing-rolls may be maintained in their proper relation with respect to the latter at all times, but also whereby the mandrcl may be prevented from fiex-- ure or bending when such article is being forced thereon, and its forward or free end he held in central relation with respect to the grooves in said reducingrolls when the article being rolled is forced entirely thereupon oris removed therefrom.

While I have shown and described the best means contemplated by me for carrying my invention into practice, I wish it distinctly understood that I do not limit myself strictly thereto, as it is obvious that the details thereof may be modified in various ways without departing from the spirit thereof.

Having now described my invention and one way in which it is or may be carried into effect, what Iclaim as new, and desire to secure by Letters Patent, is-

1. The combination, with the pair of vertitical and the pair of horizontal rolls of a universal rolling-mill and devices for adjusting each of said rolls toward and away from its fellow roll, of mechanism for connecting such adjusting devices, whereby the adjustment of all of said rolls may be simultaneously effected and to the same extent, substantially as described.

2. The combination, with the pair of vertical and the pair of horizontal rolls and bearings and screws for each of said rolls,of mechanism for connecting such screws, whereby IIO the rolls of both of said pairs may be adjusted simultaneously toward and away from its fellow roll, substantially as described.

3. The combination, with the pair of vertical and the pair of horizontal rolls, the bearings and screws for each of said rolls, the hous ing in which such rolls, bearings, and screws are mounted, a shaft arranged upon each side of the housing, and devices for connecting said screws with the shaft on their respective sides of the housing, of mechanism for rotating said shaftsin unison to cause the simultaneous adjustment of all the rolls, substantially as described.

4. The combination, with the pair of. vertical and the pair of horizontal reducing-rolls, the bearings and screws for each of said rolls, the housing in which such rolls, bearings, and screws are mounted, a shaft arranged upon each side of the housing, and devices for connecting said screws with the shaft on their re spective side of the housing, of a cylinder provided with induction and eduction pipes, a piston and a piston-rod, a rack, gears mounted on said shafts and meshing with such rack, and suitable valves for the induction and eduction pipes, substantially as described.

5. The combination, with the screws D D E E, the gearsF F, the shaft Lprovided with the gears H H P P, the gear G, the sprocketwheels G K,the chain L, and the shaft N, provided with the gears M O, of the cylinder T, provided with inductionpipes 70 7c, eductionpipes Z l, &c., the pistonrod S and piston thereon, the rack R, and suitable valvesfor the induction and eduction pipes, substantially as described.

6. The combination, with the mandrel F, the holder 19, and stock or bar n,of the arm n, the roll V,journaled in its upper end,the segmentally shaped cam r, and the spring 1*, substantially as described.

7. The combination, with the horizontal rolls of a rolling-mill and mechanism for adjusting each of said rolls toward and away from the other, of devices for supporting the article being rolled and means for rendering these devices vertically adjustable, whereby said devices may be adjusted with relation to the under ofsuch horizontal rolls as it is raised or lowered, substantially as described.

8. Thecombination, with the pair of vertical and the pair of horizontal reducing-rolls of a universal rolling-mill and mechanism for adjusting each of the rolls of said pairs toward and away from its fellow roll, of devices for supporting the article being rolled and mechanism for rendering these devices vertically adjustable,whereby said devices may be the rolls of each of said pairs toward and away from its fellow roll, of rolls for supporting the article being rolledand mechanism for vertically adjusting these latter rolls, whereby to bring them into proper relation with respect to the reducing-rolls as they are adjusted toward or away from each other, substantially as described.

10. The combination, with the pair of vertical and the pair of horizontal reducing-rolls ofa universal rollingmill and mechanism for simultaneously adjusting the rolls of each of said pairs toward and away from its fellow roll, of rolls for supporting the article being rolled, stands in which these last-mentioned rolls are mounted, and mechanism for vertically adjusting said rolls, whereby to bring them into proper relation with respect to the reducing-rolls as they are adjusted toward or away from each other, substantially as described.

11. The combination,with the stands X X, the supportingrolls X X, the bearings s s, screw-rods t t, having the gear a on each of their lower ends, and the shafts '0 2;, provided with thegears au,ot' the cylinderY, provided with the induction-pipes z z and eductionpipes z" z", 8110., the piston-rod y and piston thereon, and the rack Z,whereby the supporting-rolls of either set may all be adjusted simultaneously and by power, substantially as described.

12. The combination, with the mandrel, of devices for acting against the same at different points around its circumference to prevent it from bending or flexure in any direction, substantially as described.

13. The combination, with the mandrel F and the stand X, having the guideway 5 secured thereto, of the stock or bar6,the hinged arm 7, and the wheel 8, as and for the purpose set forth. 1

In testimony whereby I have hereunto set my hand this 20th day of December, 1886.

WILLIAM H. APPLETON.

Vitnesses:

WM. E. BURKE, GEORGE HonKINsoN. 

